Our products are comprised of food-grade, platinum-cured silicone elastomer, the very same material used in commercial bakeware for decades. This material is rated to slightly above ~500°F/260°C. Make sure that you always use the included stainless steel bowl (if applicable) and do not overfill it. Apply a “lazy” red flame from a Bic or Clipper-type lighter (never a blue flame torch) directly to your combustible material*. Within a few seconds, you should be able to enjoy your smoke. Product use is the same for any glass, wood, corncob, fruit, metal, or silicone piece. *Applying high heat and/or open flame over an extended period is misuse of the product. Damaged pieces should not be used.